Forcing Automatic Updates client (wuauclt) to install the updates:
net stop wuauserv
delete datastore folder in c:windowssoftwaredistribution; rd /s datastore
delete download folder in c:windowssoftwaredistribution; rd /s download
net start wuauserv
wuauclt /resetauthorization /detectnow
wuauclt /updatenow
If still not getting update, then try clearing out the BITS serice as well
net stop BITS & net stop wuauserv & net stop cryptsvc
rename catroot2 folder in c:windowssystem32; rename catroot2 catroot2.old
net start cryptsvc & net start wuauserv & net start BITS
wuauclt /resetauthorization /detectnow
wuauclt /updatenow
If still failing, check the Automatic Updates client log file at: %windir%Windowsupdate.log
References: